NTE NTE1673 Datasheet

NTE1673

Integrated Circuit

Video Chroma Processor

Description:

The NTE1673 is a multifunctional integrated circuit in a 28–Lead DIP type package where an APC
chroma circuit is formed so compactly as to use only 16 pins with the characteristic requirements re­maining fulfilled and the rest of pins are used for video circuits. It contains a double doefferential circuit
enabling soft video tone, a color temperature control circuit enabling reproduction of beautiful bright
white color and true color, and a high level contrast circuit elinimating brightness drop at the time of
contrast adjustment, thereby allowing a wider design margin for television set design engineers.

Functions:

D Band–Pass Amp
D Voltage Controlled Oscillation
D Peak Clip
D Color Saturation Control
D Double Differential
D Killer
D Contrast Amp
D Color Temperature Control

D Tint Control
D DC Restoration
D Automatic Saturation Control
D Automatic Phase Control
D Blanking
D Chroma Demodulation
D Bright Control

Functions:

D High level contrast system eliminating brightness drop at the time of contrast adjustment.
D Double differential circuit enabling soft video tone.
D Color temperature control function enabling reproduction of beautiful bright white color and

true color

D Capable of being connected to IC for VIR.
D Only one adjustement: APC adjustment
D Minimum number of external parts required.

Absolute Maximum Ratings

Maximum Supply Voltage, V
Allowable Power Dissipation (T
Operating Temperature Range, T
Storage Temperature Range, T

: (TA = +25°C unless otherwise specified)

max 14.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

≤ +65°C), PDmax 875mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

opr

stg

–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics: (TA = +25°C, VCC = 12V, 0dB input: burst 100mV

unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Chroma Characteristics

, chroma 200mV

p–p

p–p

ACC Amplitude Characteristic G

ACC Phase Characteristic φA +6dB – 0 ±3 deg

Killer Operating Point V
Maximum B–Y Demodulation Θ
Tint Change Range ∆T(T
Static Phase Error φΘ ∆f = ±100Hz ±1.5 ±5 – deg
APC Pull–in Range f
Demodulation Output DC Voltage V12, V13, V
Demodulation Output DC V12 – V

Video Characteristics

Video Tone Control G

Video Gain G
Contrast Variable Range ∆G
Frequency Characteristic ∆G

A

i(K)

OBM

max–Tmin

p

13

p max

G

p min

v

C
V

+6dB –7 0 ±3 dB

–20dB – –3 +2 dB

–20dB – ±3 ±7 deg

–55 –47 –40 dB

4.5 5.5 – V

) – 120 – deg

±350 ±500 – H

14

f = 5MHz –3 – – dB

6.7 7.2 7.7 V
– 300 – mV

7.0 9.5 12.0 dB

–5.0 –2.5 –1.0 dB

10 12.5 15.0 dB

8 10 12 dB

p–p

z

Pin Connection Diagram

Video Input

Color Control

ACC Detector

V

CC

Killer RC Network

X’tal

APC Control

R – Y Demodulation

G – Y Matrix

B – Y Demodulation

1
2
3
4
5
6GND
7Tint Control
8
9Tint Network 20

10Demod Network
11

13
14

Video Tone Control

28

Sharp Video Tone

27

Network
Sharp Video Tone

26

Network
Soft Video Tone

25

Network

24

Contrast Control
High Level Contrast

23

Control

22

DC Restorer Network

21

Brightness Control
Horiz Sync Output

19

Brightness Sample

18

Horiz Blank Pulse
Color Temp Control12 17
Horiz Sync Input

16
15

Video Output Driver